<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>

    <style>

        div {
            background-color: sienna; 
            width: 100px; 
            height: 100px;
        }

    </style>


</head>
<body>

    <div>这是一个块</div>
    <div>另一个块</div>


    <!-- <div>这是一个快</div> -->
    
</body>
</html>